663 lines
19 KiB
C
663 lines
19 KiB
C
/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface
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* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0
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* utility functions
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*/
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/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
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* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <osmocore/msgb.h>
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#include <osmocore/gsm48.h>
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#include <openbsc/debug.h>
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#include <openbsc/gsm_04_08.h>
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#include <openbsc/transaction.h>
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#include <openbsc/paging.h>
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#include <openbsc/signal.h>
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/* should ip.access BTS use direct RTP streams between each other (1),
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* or should OpenBSC always act as RTP relay/proxy in between (0) ? */
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int ipacc_rtp_direct = 1;
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static int gsm48_sendmsg(struct msgb *msg)
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{
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if (msg->lchan)
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msg->trx = msg->lchan->ts->trx;
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msg->l3h = msg->data;
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return rsl_data_request(msg, 0);
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}
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/* Section 9.1.8 / Table 9.9 */
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struct chreq {
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u_int8_t val;
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u_int8_t mask;
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enum chreq_type type;
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};
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/* If SYSTEM INFORMATION TYPE 4 NECI bit == 1 */
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static const struct chreq chreq_type_neci1[] = {
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{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
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{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_F },
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{ 0x68, 0xfc, CHREQ_T_CALL_REEST_TCH_H },
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{ 0x6c, 0xfc, CHREQ_T_CALL_REEST_TCH_H_DBL },
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{ 0xe0, 0xe0, CHREQ_T_SDCCH },
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{ 0x40, 0xf0, CHREQ_T_VOICE_CALL_TCH_H },
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{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
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{ 0x00, 0xf0, CHREQ_T_LOCATION_UPD },
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{ 0x10, 0xf0, CHREQ_T_SDCCH },
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{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI1 },
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{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
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{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
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{ 0x67, 0xff, CHREQ_T_LMU },
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{ 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH },
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{ 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH },
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{ 0x63, 0xff, CHREQ_T_RESERVED_SDCCH },
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{ 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE },
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};
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/* If SYSTEM INFORMATION TYPE 4 NECI bit == 0 */
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static const struct chreq chreq_type_neci0[] = {
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{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
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{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_H },
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{ 0xe0, 0xe0, CHREQ_T_TCH_F },
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{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
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{ 0x00, 0xe0, CHREQ_T_LOCATION_UPD },
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{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI0 },
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{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
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{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
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{ 0x67, 0xff, CHREQ_T_LMU },
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{ 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH },
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{ 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH },
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{ 0x63, 0xff, CHREQ_T_RESERVED_SDCCH },
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{ 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE },
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};
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static const enum gsm_chan_t ctype_by_chreq[] = {
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[CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_F,
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[CHREQ_T_CALL_REEST_TCH_F] = GSM_LCHAN_TCH_F,
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[CHREQ_T_CALL_REEST_TCH_H] = GSM_LCHAN_TCH_H,
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[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_LCHAN_TCH_H,
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[CHREQ_T_SDCCH] = GSM_LCHAN_SDCCH,
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[CHREQ_T_TCH_F] = GSM_LCHAN_TCH_F,
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[CHREQ_T_VOICE_CALL_TCH_H] = GSM_LCHAN_TCH_H,
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[CHREQ_T_DATA_CALL_TCH_H] = GSM_LCHAN_TCH_H,
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[CHREQ_T_LOCATION_UPD] = GSM_LCHAN_SDCCH,
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[CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_SDCCH,
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[CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_SDCCH,
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[CHREQ_T_PAG_R_TCH_F] = GSM_LCHAN_TCH_F,
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[CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_F,
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[CHREQ_T_LMU] = GSM_LCHAN_SDCCH,
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[CHREQ_T_RESERVED_SDCCH] = GSM_LCHAN_SDCCH,
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[CHREQ_T_RESERVED_IGNORE] = GSM_LCHAN_UNKNOWN,
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};
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static const enum gsm_chreq_reason_t reason_by_chreq[] = {
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[CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG,
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[CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL,
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[CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL,
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[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL,
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[CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER,
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[CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER,
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[CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_CALL,
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[CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
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[CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD,
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[CHREQ_T_PAG_R_ANY_NECI1] = GSM_CHREQ_REASON_PAG,
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[CHREQ_T_PAG_R_ANY_NECI0] = GSM_CHREQ_REASON_PAG,
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[CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG,
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[CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG,
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[CHREQ_T_LMU] = GSM_CHREQ_REASON_OTHER,
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[CHREQ_T_RESERVED_SDCCH] = GSM_CHREQ_REASON_OTHER,
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[CHREQ_T_RESERVED_IGNORE] = GSM_CHREQ_REASON_OTHER,
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};
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/* verify that the two tables match */
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static_assert(sizeof(ctype_by_chreq) ==
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sizeof(((struct gsm_network *) NULL)->ctype_by_chreq), assert_size);
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/*
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* Update channel types for request based on policy. E.g. in the
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* case of a TCH/H network/bsc use TCH/H for the emergency calls,
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* for early assignment assign a SDCCH and some other options.
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*/
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void gsm_net_update_ctype(struct gsm_network *network)
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{
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/* copy over the data */
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memcpy(network->ctype_by_chreq, ctype_by_chreq, sizeof(ctype_by_chreq));
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/*
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* Use TCH/H for emergency calls when this cell allows TCH/H. Maybe it
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* is better to iterate over the BTS/TRX and check if no TCH/F is available
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* and then set it to TCH/H.
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*/
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if (network->neci)
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network->ctype_by_chreq[CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_H;
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if (network->pag_any_tch) {
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if (network->neci) {
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network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_TCH_H;
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network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_TCH_H;
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} else {
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network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_TCH_F;
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network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_TCH_F;
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}
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}
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}
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enum gsm_chan_t get_ctype_by_chreq(struct gsm_network *network, u_int8_t ra)
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{
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int i;
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int length;
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const struct chreq *chreq;
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if (network->neci) {
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chreq = chreq_type_neci1;
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length = ARRAY_SIZE(chreq_type_neci1);
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} else {
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chreq = chreq_type_neci0;
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length = ARRAY_SIZE(chreq_type_neci0);
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}
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for (i = 0; i < length; i++) {
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const struct chreq *chr = &chreq[i];
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if ((ra & chr->mask) == chr->val)
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return network->ctype_by_chreq[chr->type];
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}
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LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra);
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return GSM_LCHAN_SDCCH;
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}
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enum gsm_chreq_reason_t get_reason_by_chreq(u_int8_t ra, int neci)
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{
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int i;
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int length;
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const struct chreq *chreq;
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if (neci) {
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chreq = chreq_type_neci1;
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length = ARRAY_SIZE(chreq_type_neci1);
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} else {
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chreq = chreq_type_neci0;
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length = ARRAY_SIZE(chreq_type_neci0);
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}
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for (i = 0; i < length; i++) {
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const struct chreq *chr = &chreq[i];
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if ((ra & chr->mask) == chr->val)
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return reason_by_chreq[chr->type];
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}
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LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra);
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return GSM_CHREQ_REASON_OTHER;
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}
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/* 7.1.7 and 9.1.7: RR CHANnel RELease */
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int gsm48_send_rr_release(struct gsm_lchan *lchan)
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{
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struct msgb *msg = gsm48_msgb_alloc();
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struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
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u_int8_t *cause;
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msg->lchan = lchan;
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gh->proto_discr = GSM48_PDISC_RR;
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gh->msg_type = GSM48_MT_RR_CHAN_REL;
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cause = msgb_put(msg, 1);
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cause[0] = GSM48_RR_CAUSE_NORMAL;
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DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n",
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lchan->nr, lchan->type);
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/* Send actual release request to MS */
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gsm48_sendmsg(msg);
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/* FIXME: Start Timer T3109 */
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/* Deactivate the SACCH on the BTS side */
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return rsl_deact_sacch(lchan);
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}
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int send_siemens_mrpci(struct gsm_lchan *lchan,
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u_int8_t *classmark2_lv)
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{
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struct rsl_mrpci mrpci;
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if (classmark2_lv[0] < 2)
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return -EINVAL;
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mrpci.power_class = classmark2_lv[1] & 0x7;
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mrpci.vgcs_capable = classmark2_lv[2] & (1 << 1);
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mrpci.vbs_capable = classmark2_lv[2] & (1 <<2);
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mrpci.gsm_phase = (classmark2_lv[1]) >> 5 & 0x3;
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return rsl_siemens_mrpci(lchan, &mrpci);
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}
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int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type)
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{
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/* Check the size for the classmark */
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if (length < 1 + *classmark2_lv)
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return -1;
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u_int8_t *mi_lv = classmark2_lv + *classmark2_lv + 1;
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if (length < 2 + *classmark2_lv + mi_lv[0])
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return -2;
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*mi_type = mi_lv[1] & GSM_MI_TYPE_MASK;
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return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv);
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}
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int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length,
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char *mi_string, u_int8_t *mi_type)
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{
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static const uint32_t classmark_offset =
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offsetof(struct gsm48_pag_resp, classmark2);
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u_int8_t *classmark2_lv = (uint8_t *) &resp->classmark2;
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return gsm48_extract_mi(classmark2_lv, length - classmark_offset,
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mi_string, mi_type);
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}
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int gsm48_handle_paging_resp(struct gsm_subscriber_connection *conn,
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struct msgb *msg, struct gsm_subscriber *subscr)
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{
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struct gsm_bts *bts = msg->lchan->ts->trx->bts;
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struct gsm48_hdr *gh = msgb_l3(msg);
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u_int8_t *classmark2_lv = gh->data + 1;
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struct paging_signal_data sig_data;
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if (is_siemens_bts(bts))
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send_siemens_mrpci(msg->lchan, classmark2_lv);
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if (!conn->subscr) {
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conn->subscr = subscr;
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} else if (conn->subscr != subscr) {
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LOGP(DRR, LOGL_ERROR, "<- Channel already owned by someone else?\n");
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subscr_put(subscr);
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return -EINVAL;
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} else {
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DEBUGP(DRR, "<- Channel already owned by us\n");
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subscr_put(subscr);
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subscr = conn->subscr;
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}
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sig_data.subscr = subscr;
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sig_data.bts = conn->bts;
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sig_data.conn = conn;
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counter_inc(bts->network->stats.paging.completed);
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dispatch_signal(SS_PAGING, S_PAGING_SUCCEEDED, &sig_data);
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/* Stop paging on the bts we received the paging response */
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paging_request_stop(conn->bts, subscr, conn);
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return 0;
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}
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/* Chapter 9.1.9: Ciphering Mode Command */
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int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan, int want_imeisv)
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{
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struct msgb *msg = gsm48_msgb_alloc();
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struct gsm48_hdr *gh;
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u_int8_t ciph_mod_set;
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msg->lchan = lchan;
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DEBUGP(DRR, "TX CIPHERING MODE CMD\n");
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if (lchan->encr.alg_id <= RSL_ENC_ALG_A5(0))
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ciph_mod_set = 0;
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else
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ciph_mod_set = (lchan->encr.alg_id-2)<<1 | 1;
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gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
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gh->proto_discr = GSM48_PDISC_RR;
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gh->msg_type = GSM48_MT_RR_CIPH_M_CMD;
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gh->data[0] = (want_imeisv & 0x1) << 4 | (ciph_mod_set & 0xf);
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return rsl_encryption_cmd(msg);
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}
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static void gsm48_cell_desc(struct gsm48_cell_desc *cd,
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const struct gsm_bts *bts)
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{
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cd->ncc = (bts->bsic >> 3 & 0x7);
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cd->bcc = (bts->bsic & 0x7);
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cd->arfcn_hi = bts->c0->arfcn >> 8;
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cd->arfcn_lo = bts->c0->arfcn & 0xff;
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}
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void gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd,
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const struct gsm_lchan *lchan)
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{
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u_int16_t arfcn = lchan->ts->trx->arfcn & 0x3ff;
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cd->chan_nr = lchan2chan_nr(lchan);
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if (!lchan->ts->hopping.enabled) {
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cd->h0.tsc = lchan->ts->trx->bts->tsc;
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cd->h0.h = 0;
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cd->h0.arfcn_high = arfcn >> 8;
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cd->h0.arfcn_low = arfcn & 0xff;
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} else {
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cd->h1.tsc = lchan->ts->trx->bts->tsc;
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cd->h1.h = 1;
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cd->h1.maio_high = lchan->ts->hopping.maio >> 2;
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cd->h1.maio_low = lchan->ts->hopping.maio & 0x03;
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cd->h1.hsn = lchan->ts->hopping.hsn;
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}
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}
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#define GSM48_HOCMD_CCHDESC_LEN 16
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/* Chapter 9.1.15: Handover Command */
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int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan,
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u_int8_t power_command, u_int8_t ho_ref)
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{
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struct msgb *msg = gsm48_msgb_alloc();
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struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
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struct gsm48_ho_cmd *ho =
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(struct gsm48_ho_cmd *) msgb_put(msg, sizeof(*ho));
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msg->lchan = old_lchan;
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gh->proto_discr = GSM48_PDISC_RR;
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gh->msg_type = GSM48_MT_RR_HANDO_CMD;
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/* mandatory bits */
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gsm48_cell_desc(&ho->cell_desc, new_lchan->ts->trx->bts);
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gsm48_lchan2chan_desc(&ho->chan_desc, new_lchan);
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ho->ho_ref = ho_ref;
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ho->power_command = power_command;
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if (new_lchan->ts->hopping.enabled) {
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struct gsm_bts *bts = new_lchan->ts->trx->bts;
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struct gsm48_system_information_type_1 *si1;
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uint8_t *cur;
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si1 = GSM_BTS_SI(bts, SYSINFO_TYPE_1);
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/* Copy the Cell Chan Desc (ARFCNS in this cell) */
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msgb_put_u8(msg, GSM48_IE_CELL_CH_DESC);
|
|
cur = msgb_put(msg, GSM48_HOCMD_CCHDESC_LEN);
|
|
memcpy(cur, si1->cell_channel_description,
|
|
GSM48_HOCMD_CCHDESC_LEN);
|
|
/* Copy the Mobile Allocation */
|
|
msgb_tlv_put(msg, GSM48_IE_MA_BEFORE,
|
|
new_lchan->ts->hopping.ma_len,
|
|
new_lchan->ts->hopping.ma_data);
|
|
}
|
|
/* FIXME: optional bits for type of synchronization? */
|
|
|
|
return gsm48_sendmsg(msg);
|
|
}
|
|
|
|
/* Chapter 9.1.2: Assignment Command */
|
|
int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan *lchan, u_int8_t power_command)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc();
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
struct gsm48_ass_cmd *ass =
|
|
(struct gsm48_ass_cmd *) msgb_put(msg, sizeof(*ass));
|
|
|
|
DEBUGP(DRR, "-> ASSIGNMENT COMMAND tch_mode=0x%02x\n", lchan->tch_mode);
|
|
|
|
msg->lchan = dest_lchan;
|
|
gh->proto_discr = GSM48_PDISC_RR;
|
|
gh->msg_type = GSM48_MT_RR_ASS_CMD;
|
|
|
|
/*
|
|
* fill the channel information element, this code
|
|
* should probably be shared with rsl_rx_chan_rqd(),
|
|
* gsm48_tx_chan_mode_modify. But beware that 10.5.2.5
|
|
* 10.5.2.5.a have slightly different semantic for
|
|
* the chan_desc. But as long as multi-slot configurations
|
|
* are not used we seem to be fine.
|
|
*/
|
|
gsm48_lchan2chan_desc(&ass->chan_desc, lchan);
|
|
ass->power_command = power_command;
|
|
|
|
/* optional: cell channel description */
|
|
|
|
msgb_tv_put(msg, GSM48_IE_CHANMODE_1, lchan->tch_mode);
|
|
|
|
/* mobile allocation in case of hopping */
|
|
if (lchan->ts->hopping.enabled) {
|
|
msgb_tlv_put(msg, GSM48_IE_MA_BEFORE, lchan->ts->hopping.ma_len,
|
|
lchan->ts->hopping.ma_data);
|
|
}
|
|
|
|
/* in case of multi rate we need to attach a config */
|
|
if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) {
|
|
if (lchan->mr_conf.ver == 0) {
|
|
LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec "
|
|
"without multirate config.\n");
|
|
} else {
|
|
u_int8_t *data = msgb_put(msg, 4);
|
|
data[0] = GSM48_IE_MUL_RATE_CFG;
|
|
data[1] = 0x2;
|
|
memcpy(&data[2], &lchan->mr_conf, 2);
|
|
}
|
|
}
|
|
|
|
return gsm48_sendmsg(msg);
|
|
}
|
|
|
|
/* 9.1.5 Channel mode modify: Modify the mode on the MS side */
|
|
int gsm48_tx_chan_mode_modify(struct gsm_lchan *lchan, u_int8_t mode)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc();
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
struct gsm48_chan_mode_modify *cmm =
|
|
(struct gsm48_chan_mode_modify *) msgb_put(msg, sizeof(*cmm));
|
|
|
|
DEBUGP(DRR, "-> CHANNEL MODE MODIFY mode=0x%02x\n", mode);
|
|
|
|
lchan->tch_mode = mode;
|
|
msg->lchan = lchan;
|
|
gh->proto_discr = GSM48_PDISC_RR;
|
|
gh->msg_type = GSM48_MT_RR_CHAN_MODE_MODIF;
|
|
|
|
/* fill the channel information element, this code
|
|
* should probably be shared with rsl_rx_chan_rqd() */
|
|
gsm48_lchan2chan_desc(&cmm->chan_desc, lchan);
|
|
cmm->mode = mode;
|
|
|
|
/* in case of multi rate we need to attach a config */
|
|
if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) {
|
|
if (lchan->mr_conf.ver == 0) {
|
|
LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec "
|
|
"without multirate config.\n");
|
|
} else {
|
|
u_int8_t *data = msgb_put(msg, 4);
|
|
data[0] = GSM48_IE_MUL_RATE_CFG;
|
|
data[1] = 0x2;
|
|
memcpy(&data[2], &lchan->mr_conf, 2);
|
|
}
|
|
}
|
|
|
|
return gsm48_sendmsg(msg);
|
|
}
|
|
|
|
int gsm48_lchan_modify(struct gsm_lchan *lchan, u_int8_t lchan_mode)
|
|
{
|
|
int rc;
|
|
|
|
rc = gsm48_tx_chan_mode_modify(lchan, lchan_mode);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
return rc;
|
|
}
|
|
|
|
int gsm48_rx_rr_modif_ack(struct msgb *msg)
|
|
{
|
|
int rc;
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
struct gsm48_chan_mode_modify *mod =
|
|
(struct gsm48_chan_mode_modify *) gh->data;
|
|
|
|
DEBUGP(DRR, "CHANNEL MODE MODIFY ACK\n");
|
|
|
|
if (mod->mode != msg->lchan->tch_mode) {
|
|
LOGP(DRR, LOGL_ERROR, "CHANNEL MODE change failed. Wanted: %d Got: %d\n",
|
|
msg->lchan->tch_mode, mod->mode);
|
|
return -1;
|
|
}
|
|
|
|
/* update the channel type */
|
|
switch (mod->mode) {
|
|
case GSM48_CMODE_SIGN:
|
|
msg->lchan->rsl_cmode = RSL_CMOD_SPD_SIGN;
|
|
break;
|
|
case GSM48_CMODE_SPEECH_V1:
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
msg->lchan->rsl_cmode = RSL_CMOD_SPD_SPEECH;
|
|
break;
|
|
case GSM48_CMODE_DATA_14k5:
|
|
case GSM48_CMODE_DATA_12k0:
|
|
case GSM48_CMODE_DATA_6k0:
|
|
case GSM48_CMODE_DATA_3k6:
|
|
msg->lchan->rsl_cmode = RSL_CMOD_SPD_DATA;
|
|
break;
|
|
}
|
|
|
|
/* We've successfully modified the MS side of the channel,
|
|
* now go on to modify the BTS side of the channel */
|
|
rc = rsl_chan_mode_modify_req(msg->lchan);
|
|
|
|
/* FIXME: we not only need to do this after mode modify, but
|
|
* also after channel activation */
|
|
if (is_ipaccess_bts(msg->lchan->ts->trx->bts) && mod->mode != GSM48_CMODE_SIGN)
|
|
rsl_ipacc_crcx(msg->lchan);
|
|
return rc;
|
|
}
|
|
|
|
int gsm48_parse_meas_rep(struct gsm_meas_rep *rep, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
u_int8_t *data = gh->data;
|
|
struct gsm_bts *bts = msg->lchan->ts->trx->bts;
|
|
struct bitvec *nbv = &bts->si_common.neigh_list;
|
|
struct gsm_meas_rep_cell *mrc;
|
|
|
|
if (gh->msg_type != GSM48_MT_RR_MEAS_REP)
|
|
return -EINVAL;
|
|
|
|
if (data[0] & 0x80)
|
|
rep->flags |= MEAS_REP_F_BA1;
|
|
if (data[0] & 0x40)
|
|
rep->flags |= MEAS_REP_F_UL_DTX;
|
|
if ((data[1] & 0x40) == 0x00)
|
|
rep->flags |= MEAS_REP_F_DL_VALID;
|
|
|
|
rep->dl.full.rx_lev = data[0] & 0x3f;
|
|
rep->dl.sub.rx_lev = data[1] & 0x3f;
|
|
rep->dl.full.rx_qual = (data[3] >> 4) & 0x7;
|
|
rep->dl.sub.rx_qual = (data[3] >> 1) & 0x7;
|
|
|
|
rep->num_cell = ((data[3] >> 6) & 0x3) | ((data[2] & 0x01) << 2);
|
|
if (rep->num_cell < 1 || rep->num_cell > 6)
|
|
return 0;
|
|
|
|
/* an encoding nightmare in perfection */
|
|
mrc = &rep->cell[0];
|
|
mrc->rxlev = data[3] & 0x3f;
|
|
mrc->neigh_idx = data[4] >> 3;
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = ((data[4] & 0x07) << 3) | (data[5] >> 5);
|
|
if (rep->num_cell < 2)
|
|
return 0;
|
|
|
|
mrc = &rep->cell[1];
|
|
mrc->rxlev = ((data[5] & 0x1f) << 1) | (data[6] >> 7);
|
|
mrc->neigh_idx = (data[6] >> 2) & 0x1f;
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = ((data[6] & 0x03) << 4) | (data[7] >> 4);
|
|
if (rep->num_cell < 3)
|
|
return 0;
|
|
|
|
mrc = &rep->cell[2];
|
|
mrc->rxlev = ((data[7] & 0x0f) << 2) | (data[8] >> 6);
|
|
mrc->neigh_idx = (data[8] >> 1) & 0x1f;
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = ((data[8] & 0x01) << 5) | (data[9] >> 3);
|
|
if (rep->num_cell < 4)
|
|
return 0;
|
|
|
|
mrc = &rep->cell[3];
|
|
mrc->rxlev = ((data[9] & 0x07) << 3) | (data[10] >> 5);
|
|
mrc->neigh_idx = data[10] & 0x1f;
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = data[11] >> 2;
|
|
if (rep->num_cell < 5)
|
|
return 0;
|
|
|
|
mrc = &rep->cell[4];
|
|
mrc->rxlev = ((data[11] & 0x03) << 4) | (data[12] >> 4);
|
|
mrc->neigh_idx = ((data[12] & 0xf) << 1) | (data[13] >> 7);
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = (data[13] >> 1) & 0x3f;
|
|
if (rep->num_cell < 6)
|
|
return 0;
|
|
|
|
mrc = &rep->cell[5];
|
|
mrc->rxlev = ((data[13] & 0x01) << 5) | (data[14] >> 3);
|
|
mrc->neigh_idx = ((data[14] & 0x07) << 2) | (data[15] >> 6);
|
|
mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1);
|
|
mrc->bsic = data[15] & 0x3f;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value)
|
|
{
|
|
struct msgb *msg;
|
|
struct gsm48_hdr *gh;
|
|
|
|
msg = gsm48_msgb_alloc();
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
|
|
gh->proto_discr = GSM48_PDISC_MM;
|
|
gh->msg_type = GSM48_MT_MM_CM_SERV_REJ;
|
|
gh->data[0] = value;
|
|
|
|
return msg;
|
|
}
|
|
|
|
struct msgb *gsm48_create_loc_upd_rej(uint8_t cause)
|
|
{
|
|
struct gsm48_hdr *gh;
|
|
struct msgb *msg;
|
|
|
|
msg = gsm48_msgb_alloc();
|
|
if (!msg)
|
|
return NULL;
|
|
|
|
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
|
|
gh->proto_discr = GSM48_PDISC_MM;
|
|
gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT;
|
|
gh->data[0] = cause;
|
|
return msg;
|
|
}
|